Quantum-Si Ownership | Who Owns Quantum-Si?

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Quantum-Si Ownership Summary

Quantum-Si is owned by 28.50% institutional investors, 12.90% insiders, and 58.60% retail investors. Ark investment management is the largest institutional shareholder, holding 6.21% of QSI shares. ARK Genomic Revolution is the top mutual fund, with 5.51% of its assets in Quantum-Si shares.

QSI Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Quantum-Si	28.50%	12.90%	58.60%
Sector	Healthcare Stocks	57.39%	9.93%	32.68%
Industry	Biotech Stocks	68.48%	9.65%	21.87%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Ark investment management	8.85M	6.21%	$23.89M
Blackrock funding, inc. /de	8.44M	5.93%	$22.78M
Blackrock	7.00M	4.94%	$7.35M
Nikko asset management americas	5.97M	4.19%	$16.05M
Sumitomo mitsui trust	5.97M	4.19%	$16.11B
Vanguard group	5.49M	3.86%	$14.83M
State street	2.37M	1.67%	$2.49M
Geode capital management	2.37M	1.66%	$6.40M
Susquehanna group, llp	1.00M	0.70%	$2.71M
Goldman sachs group	1.00M	0.70%	$2.71M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Fosun	743.93K	0.63%	$2.01M
Green alpha advisors	158.86K	0.34%	$428.92K
Ark investment management	8.85M	0.20%	$23.89M
Nikko asset management americas	5.97M	0.17%	$16.05M
Shay capital	216.55K	0.09%	$584.67K
Knollwood investment advisory	300.00K	0.08%	$810.00K
Gsa capital partners llp	374.28K	0.07%	$1.01M
Xtx topco	245.59K	0.05%	$663.08K
Axq capital, lp	34.07K	0.04%	$91.98K
Red wave investments	37.00K	0.03%	$99.90K

Top Buyers

Holder	Shares	% Assets	Change
Blackrock funding, inc. /de	8.44M	0.00%	1.54M
Susquehanna group, llp	1.00M	0.00%	958.84K
Goldman sachs group	1.00M	0.00%	759.99K
Ubs group	592.11K	0.00%	542.95K
Renaissance	544.96K	0.00%	503.40K

Top Sellers

Holder	Shares	% Assets	Change
Ark investment management	8.85M	0.20%	-2.99M
Sumitomo mitsui trust	5.97M	0.01%	-1.58M
Nikko asset management americas	5.97M	0.17%	-1.56M
General american investors	-	-	-294.35K
Nuveen asset management	319.10K	0.00%	-245.98K

New Positions

Holder	Shares	% Assets	Change	Value
Centiva capital, lp	143.18K	0.01%	143.18K	$386.57K
Belvedere trading	41.05K	0.00%	41.05K	$110.84K
State of wisconsin investment board	36.33K	0.00%	36.33K	$98.09K
Manufacturers life insurance company, the	34.85K	0.00%	34.85K	$94.09K
Winton group	34.61K	0.01%	34.61K	$93.45K

Sold Out

Holder	Change
Rothschild investment	-75.00
Founders capital management	-100.00
Allspring global investments	-292.00
Capital performance advisors llp	-355.00
Comerica bank	-513.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2024	63	-42.73%	40,587,687	-21.92%	28	2.14%	37	-13.95%	8	-75.00%
Sep 30, 2024	110	8.91%	51,983,353	-2.83%	36	2.56%	43	-2.27%	32	6.67%
Jun 30, 2024	101	3.06%	53,496,649	1.12%	37	2.70%	44	29.41%	30	-16.67%
Mar 31, 2024	98	5.38%	52,901,605	-6.36%	37	2.35%	34	-	36	33.33%
Dec 31, 2023	93	-6.06%	56,492,161	3.69%	39	2.69%	34	-33.33%	27	58.82%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
ARK Genomic Revolution	8.72M	5.51%	-3.04M
ARK Genomic Revolution ETF	8.39M	4.58%	323.33K
Nikko AM ARK Pstv Chg Innovt P JPY Acc	4.67M	2.55%	-
iShares Russell 2000 ETF	3.17M	1.73%	-27.45K
Vanguard Total Stock Mkt Idx Inv	3.02M	1.65%	-
Nikko Gbl All Biological Genome Eq MF	2.02M	1.42%	-343.46K
Vanguard Institutional Extnd Mkt Idx Tr	1.68M	0.92%	-
iShares Russell 2000 Value ETF	1.10M	0.60%	-
Fidelity Small Cap Index	1.03M	0.56%	-19.22K
State St Russell Sm/Mid Cp® Indx NL Cl C	710.86K	0.39%	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
Mar 21, 2025	Hawkins Jeffrey Alan	President & CEO	Sell	$32.85K
Mar 21, 2025	LaPointe Christian	General Counsel & Corp. Secr.	Sell	$6.78K
Mar 21, 2025	Keyes Jeffry R.	Chief Financial Officer	Sell	$11.95K
Mar 21, 2025	Vieceli John S.	Chief Product Officer	Sell	$5.98K
Dec 27, 2024	ROTHBERG JONATHAN M		Sell	$173.31K

Insider Transactions Trends

Date	Buy	Sell
2025 Q1	-	-
2024 Q4	-	3
2024 Q3	5	2
2024 Q2	-	2
2024 Q1	3	-

QSI Ownership FAQ

Who Owns Quantum-Si?

Quantum-Si shareholders are primarily institutional investors at 28.50%, followed by 12.90% insiders and 58.60% retail investors. The average institutional ownership in Quantum-Si's industry, Biotech Stocks , is 68.48%, which Quantum-Si falls below.

Who owns the most shares of Quantum-Si?

Quantum-Si’s largest shareholders are Ark investment management (8.85M shares, 6.21%), Blackrock funding, inc. /de (8.44M shares, 5.93%), and Blackrock (7M shares, 4.94%). Together, they hold 17.08% of Quantum-Si’s total shares outstanding.

Does Blackrock own Quantum-Si?

Yes, BlackRock owns 4.94% of Quantum-Si, totaling 7M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 7.35M$. In the last quarter, BlackRock decreased its holdings by -231K shares, a -3.20% change.

Who is Quantum-Si’s biggest shareholder by percentage of total assets invested?

Fosun is Quantum-Si’s biggest shareholder by percentage of total assets invested, with 0.63% of its assets in 743.94K Quantum-Si shares, valued at 2.01M$.

Who is the top mutual fund holder of Quantum-Si shares?

ARK Genomic Revolution is the top mutual fund holder of Quantum-Si shares, with 5.51% of its total shares outstanding invested in 8.72M Quantum-Si shares.

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